windows-messages

问题 I'm writing an windows based application in Visual Studio 2010. My host PC is connected to two Canon EOS 600D. So far I managed two take a picture, download it directly (without a SD card) to the host PC and store the pictures under a specific name on the host. If I execute my code in a loop, it also works fine (the index of the loop specifies the camera and the destination file). In a next step I used OpenMP2.0 to speed up the loop (this is my first project with OpenMP). Now the pictures are

问题 I'm starting a process in C# and then sending Windows messages to that process with SendMessage. Usually I send the messages to Process.MainWindowHandle, but in some instances I might need to find a child window handle and send messages there instead. How would I do that in C# and what are the options for finding child windows (i.e. do a need to know the name of the window or are there other options)? 回答1: Take a look at EnumChildWindows (pinvoke.net) 来源： https://stackoverflow.com/questions

问题 I'm working on an application that simulates a Windows mouse based on other behavior. One example is that pressing the + or - keys on the keyboard sends the WM_MOUSEWHEEL message to a target window with an appropriate delta. The problem is that in some situations I'm having a hard time replicating the messages that i think windows is sending to the target application. Are there any ways to record windows messages sent to a specific window (hopefully with a filter for which messages I want to

问题 I'm working on an application that simulates a Windows mouse based on other behavior. One example is that pressing the + or - keys on the keyboard sends the WM_MOUSEWHEEL message to a target window with an appropriate delta. The problem is that in some situations I'm having a hard time replicating the messages that i think windows is sending to the target application. Are there any ways to record windows messages sent to a specific window (hopefully with a filter for which messages I want to

问题 I'm trying to write a better (I think is better) and reusable WndProc procedure, but the code below does not work because when I add more arguments to the sub firm it says that the sub does not accept that amount of arguments, of course that is reasonable. But I know that this trick can be done because I've seen this same wndproc sub with a lot of custom arguments time ago in some thirdparty classes which I don't remember where I've seen neither I don't remember how them did the trick. Then,

问题 I have some code like this: TBBUTTONINFO mtbbi; HWND hwnd; HANDLE hProc; DWORD dwProcessID; void* lpData; ..... GetWindowThreadProcessId(hwnd, &dwProcessID); hProc = OpenProcess(PROCESS_ALL_ACCESS, 0, dwProcessID); lpData = VirtualAllocEx(hProc , 0, sizeof(TBBUTTONINFO), MEM_COMMIT, PAGE_READWRITE); memset(&mtbbi,0,sizeof(mtbbi)); mtbbi.cbSize=sizeof(TBBUTTONINFO); mtbbi.dwMask=TBIF_BYINDEX|TBIF_LPARAM; WriteProcessMemory(hProc,lpData,&mtbbi,sizeof(TBBUTTONINFO),&dwBytesRead); SendMessage

问题 I need to intercept the WM_PASTE message for a TEdit component which is placed inside a TFrame 's descendant class. If a condition is not satisfied, I want to iniby the paste operation. Is there a way to do this at the frame level? (I mean, without declaring a TEdit 's descendant) 回答1: Is there a way to do this at the frame level? (I mean, without declaring a TEdit 's descendant) WM_PASTE is sent directly to the TEdit window, the TFrame never sees it, so you must subclass the TEdit directly

问题 My WndProc isn't seeing mouse-up notifications when I click with a modifier key (shift or control) pressed. I see them without the modifier key, and I see mouse-down notifications with the modifier keys. I'm trying to track user actions in a component I didn't write, so I'm using the Windows Forms NativeWindow wrapper (wrapping the component) to get Windows messages from the WndProc() method. I've tried tracking the notifications I do get, and I the only clue I see is WM_CAPTURECHANGED. I've

问题 I'm trying to find out whether broadcast messages will be sent to message only windows, i.e. created as: hWnd = CreateWindow(MAKEINTATOM(RegisterClass(&wnd)), NULL, 0, 0, 0, 0, 0, 0, HWND_MESSAGE, hInstance, 0); Thing is that I don't get any broadcast messages to that window... ;) 回答1: Your suspicions are correct. Message-only windows (those created by specifying HWND_MESSAGE for the hwndParent parameter of the CreateWindowEx function) do not receive broadcast notifications: A message-only

问题 I am writing a custom control in .NET Windows Forms. Consider the following code: protected override void WndProc(ref Message m) { base.WndProc(ref m); switch(m.Msg) { case WM_LBUTTONDOWN: // Yes, it's defined correctly. MessageBox.Show("Left Button Down"); break; } } It works when running, but I need it to work in the designer. How can I achieve this? NOTE: I guess someone might say that " You can't detect clicks in the designer because the design surface captures them and processes them as